GUACAMOLE-708: Add properties for automatic account creation.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/java/org/apache/guacamole/auth/mysql/conf/MySQLEnvironment.java

@@ -386,5 +386,11 @@ public class MySQLEnvironment extends JDBCEnvironment {
     public String getMYSQLSSLClientPassword() throws GuacamoleException {
         return getProperty(MySQLGuacamoleProperties.MYSQL_SSL_TRUST_PASSWORD);
     }
+    
+    @Override
+    public boolean autoCreateAbsentAccounts() throws GuacamoleException {
+        return getProperty(MySQLGuacamoleProperties.MYSQL_AUTO_CREATE_ACCOUNTS,
+                false);
+    }
 
 }

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/java/org/apache/guacamole/auth/mysql/conf/MySQLGuacamoleProperties.java

@@ -240,5 +240,13 @@ public class MySQLGuacamoleProperties {
         public String getName() { return "mysql-ssl-client-password"; }
         
     };
+    
+    public static final BooleanGuacamoleProperty MYSQL_AUTO_CREATE_ACCOUNTS =
+            new BooleanGuacamoleProperty() {
+    
+        @Override
+        public String getName() { return "mysql-auto-create-accounts"; }
+                
+    };
 
 }